SOLUTION: A triangle has sides a=2 and b=3 and angle C= 40 degrees. What is the length of side c

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Question 339482: A triangle has sides a=2 and b=3 and angle C= 40 degrees. What is the length of side c
Answer by jrfrunner(365) About Me  (Show Source):
You can put this solution on YOUR website!
use the law of cosines
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c%5E2=a%5E2%2Bb%5E2-2abcosc
c%5E2=2%5E2%2B3%5E2-2%2A2%2A3%2Acos%2840%29=4%2B9-12%2Acos%2840%29=3.807
c=sqrt%283.807%29=1.951